Hayden M6 Chain Tensioner for Harley Davidson

·  The M6 automatically adjust the primary chain on Big Twin Harley Davidsons

-   Fits 2001-2006 Twin Cam (except 2006 Dyna)

·  New Genuine Hayden Enterprises M-6 Automatic Primary Chain Tensioner.

·  Self adjusting automatic primary chain tensioner with double springs

·  Keeps chain in adjustment while eliminating vibrations.

·  Helps with smooth shifting, less 1st gear clunk! 

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